2017 ASHS Annual Conference
Use of Vibration Stimulation for Growth Inhibition of Tomato Plug Seedlings
Hyeon Min Kim1, Hye Min Kim1, Hye Ri Lee2, and Seung Jae Hwang1,2,3*
1Department of Horticulture, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea; 2Department of Horticulture, College of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea; 3Institute of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea
This study was conducted to investigate the effect of growth regulation for growth inhibition of tomato seedlings as affected by different vibration speeds as physical stimulations of environment-friendly method. Tomato (Solanum lycopersicum L. ‘B-blocking’) seeds were sown in 40-cell plug trays (54 × 27.5 × 5 cm) using commercial plug medium on Feb. 11, 2017. The cultivation environment in a venlo-type glasshouse was maintained as cultivation temperature range of 17 - 25oC and the relative humidity of 50 ± 10%. When the true leaf appeared, tomato seedlings were treated vibration as 0 (control), 100, 150 or 200 rpm for 120 seconds per day. During the experimental period, nutrient solution was supplied by the sub-irrigation as pH 6.5 and EC 1.5 dS･m-1. The growth of tomato plug seedlings was measured at 24th day after treatments. Plant height and internode length were shorter in vibration stimulation treatments than in the control, among them, 200 rpm treatment was significantly the shortest. Likewise, T/R ratio was the lowest in the 200 rpm. The shoot fresh weight was the heaviest in the control, and the lightest in the 200 rpm. However, stem diameter was significantly the thickest in the 200 rpm, and the thinnest in the 150 rpm. The dwarf rate of tomato seedlings was high in the order by 200 rpm, 150 rpm, 100 rpm, and control as 19, 6, 6, and 0%, respectively. The chlorophyll value (SPAD), leaf area, chlorophyll fluorescence (Fv/Fm), and compactness showed no significant difference in all treatments. These results suggest that the vibration speed was best achievement in the 200 rpm for growth inhibition of tomato plug seedlings.
Additional key words: environment-friendly, plant height, Solanum lycopersicum, stem diameter
This work was carried out with the support of “Cooperative Research Program for Agriculture Science & Technology Development (Project No PJ01277301)” Rural Development Administration, Republic of Korea.
T. +82-55-772-1916; F. +82-55-772-1919; hsj@gnu.ac.kr